JP5133757B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

DESCRIPTION OF RELATED ART Conventionally, the absorbent article represented by the disposable paper diaper is known. As disposable paper diapers, pants-type and tape-type paper diapers are generally known. Of these, the tape-type paper diaper includes a main body unit including a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorber interposed between the top sheet and the back sheet, And a pair of tape portions extending to both sides of the back side portion of the main body portion. In addition, the tape-type paper diaper is provided with an elastic member such as a rubber thread at a site along the waist of the wearer, a site along the circumference of the leg, a crotch portion, etc., in order to adhere to the wearer and prevent body fluid from leaking. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 9-10260

  However, when the wearer raises and lowers such a tape-type paper diaper, only the rubber thread around the waist expands and contracts due to the change in the circumference of the waist, and the paper diaper is less likely to interlock with the part around the leg and the crotch. Had the problem of poor fit.

  The subject of this invention is providing the absorbent article which can improve the fitting property, when a wearer raises and lowers a tape-type paper diaper up and down.

In order to solve the above problem, the invention according to claim 1 is:
A body portion having a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorbent body interposed between the top sheet and the back sheet; A tape-type absorbent article comprising a pair of tape portions extending to both sides of the back side portion of the main body portion, and a target portion for locking the pair of tape portions ,
Legs positioned around the legs of the wearer at the time of wearing from both edges of the crotch part of the main body located between the abdomen and the back of the body located on the abdomen of the wearer when worn A leg-around elastic member arranged continuously through at least a portion of the pair of tape portions to a position protruding from the main body portion ;
A crotch elastic member provided from the ventral side portion to the dorsal side portion from the center in the width direction than the leg elastic member,
The crotch elastic member is continuously arranged from both edges of the crotch through the leg periphery to a position protruding from at least the main body of the pair of tape parts, and the abdomen The ventral-side extension part that extends outward from the crotch part of the side part is arranged linearly along the longitudinal direction on the side of the target part .

The invention according to claim 2 is the absorbent article according to claim 1 ,
The elastic force necessary to extend and contract the leg elastic member and the crotch elastic member by a unit length is a part located in the tape part, a part located in the leg peripheral part, and a part located in the crotch part. It is characterized by becoming smaller in order.

The invention according to claim 3 is the absorbent article according to claim 1 or 2 ,
A back-side elastic member arranged linearly along the width direction from one tape portion to the other tape portion via the back-side portion is provided.

  According to the present invention, since the leg circumference elastic member continuously disposed over the crotch part, the leg circumference part, and the tape part is provided, when the wearer raises and lowers the disposable diaper, The leg circumference and the tape part expand and contract in conjunction with each other, and the fit at the time of wearing can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present embodiment, as an absorbent article, a disposable disposable diaper for adults will be described below as an example.

  FIG. 1 is a developed plan view of the disposable paper diaper according to the present embodiment developed with the back sheet as the top surface, and FIG. 2 is a developed plan view with the top sheet as the top surface. 3 is a cross-sectional view of the main part of the disposable paper diaper along the line III-III in FIG. 2, and FIG. 4 is a perspective view of the disposable paper diaper assembled in a state when it is attached.

  A disposable paper diaper (hereinafter referred to as a paper diaper) 1 includes a paper diaper main body 10 as a main body part, tape parts 20 and 20 for mounting the paper diaper main body 10 on a human body, and a target part for locking the tape part 20. 30.

The paper diaper main body 10 includes a top sheet 10a made of a liquid-permeable nonwoven fabric or the like provided on the contact surface side with a human body, a liquid-impervious back sheet 10b provided on the outside side when worn, the top sheet 10a and the back sheet. 10b, and the gather sheets 13 and 13 provided along the longitudinal direction of the disposable diaper main body 10 are provided on both sides of the absorbent body 12 on the surface sheet 10a side.
Here, the inside means the center side in the width direction of the paper diaper 1, and the outside means the side away from the center in the width direction of the paper diaper 1. The longitudinal direction refers to the long direction of the paper diaper body 10, and the width direction refers to the short direction of the paper diaper body 10.

The disposable diaper main body 10 is formed with an abdominal side portion 15 at one end and a back side portion 16 at the other end so as to cover the crotch portion of the wearer from the abdominal side to the back side when worn. . A crotch portion 17 is formed between the ventral side portion 15 and the back side portion 16 so as to be recessed inward.
From both edge portions of the crotch portion 17, rear leg surrounding portions (leg surrounding portions) 18, 18 are formed so as to surround the back of the wearer's legs when worn toward the back side portion 16. Further, front leg surrounding portions 19 and 19 are formed so as to surround the front of the wearer's leg when attached to the abdominal side portion 15.

And the edge part 151 of the belly side part 15 of the paper diaper main body 10 and the edge part 161 of the back | dorsal side part 16 form the circumference | surroundings of the trunk | drum when the paper diaper 1 is mounted | worn. In particular, as the part forming the waist, the abdomen 15 extends to the outside of the crotch 17 at the abdomen 15 and the outside 15 extends from the crotch 17 at the back 16. The protruding back side extension parts 162 and 162 are formed.
Further, tape portions 20 and 20 projecting outward are provided on the side edge portions 163 and 163 of the back side extension portions 162 and 162 of the back side portion 16, respectively.

The tape parts 20 and 20 are formed, for example, by overlapping two sheets made of nonwoven fabric or the like, and the inside thereof becomes an overlapping part W1 that overlaps the extension parts 162 and 162 of the back side part 16, and the outside is It is provided so that it may become the protrusion part W2 which protrudes in the right-and-left side of the extension parts 162 and 162 of the back side part 16 (refer FIG. 5). And both the side parts of the tape parts 20 and 20 are provided with two convex parts 21 and 21 each projecting outward in a longitudinal direction. A fastening tape 22 as a fastening member which is a male member of a surface fastener is attached to each of the convex portions 21 and 21.
These four fastening tapes 22... Are locked to the target portion 30 that is a female member of the hook and loop fastener provided on the back sheet 10 b of the ventral side portion 15.
The tape portions 20 and 20 include a plurality of tape portions arranged so as to extend from the side edge portions 163 and 163 of the back-side extending portions 162 and 162 to the side edge portions 24 and 24 of the tape portions 20 and 20. Elastic members 26 are provided.

  The longitudinal edge 164 of the back side portion 16 extends from the longitudinal end portion 24 of one tape portion 20 through the side edge portion 163 of the back side portion 16 in the longitudinal direction of the other tape portion 20. A plurality of (for example, two) back-side elastic members 2a made of rubber thread or the like arranged in a straight line over the end portion 24 are provided, and a planar gather 165 is formed by the back-side elastic members 2a, and is mounted. It can be stretched to fit around the torso of the person. The back elastic member 2 a is continuously provided from the end 24 in the width direction of one tape portion 20 to the end 24 in the width direction of the other tape portion 20.

  The absorbent body 12 absorbs water-like components such as urine as body fluid when the disposable diaper 1 is used. The absorbent body 12 is made of absorbent material such as cotton and pulp, sheet-like base material such as fiber or film, and high water absorption. Formed in combination with a functional resin. The absorber 12 is formed in a length extending from the ventral side 15 to the back side 16. Further, the length of the absorbent body 12 in the width direction is narrow at the center portion 12 a in accordance with the shape of the crotch portion 17, and the ventral end portion 12 b and the dorsal end portion 12 c in the longitudinal direction are on the ventral side of the ventral portion 15. The width is formed wider than the central portion 12 a in accordance with the shapes of the extension portion 152 and the back side extension portion 162 of the back side portion 16.

  The gather sheets 13, 13 are on the top sheet 10 a side, and in the crotch part 17, on both sides in the width direction across the central part 12 a of the absorbent body 12, from the longitudinal edge 154 of the ventral side part 15 to the back side part. Sixteen longitudinal edges 164 are provided respectively.

As shown in FIG. 3, the gather sheet 13, the outer portion in the width direction is fixed to the surface of the back sheet 10 b on the top sheet 10 a side, and around the top sheet 10 a side on the side of the absorber 12. And is fixed to the upper surface of the topsheet 10a. And the width direction inner side part of this gather sheet 13 is not being fixed to the surface sheet 10a, but is the free part 131, and this gather sheet 13 stood | started up in the cross-sectional substantially square shape and reverse letter shape. A gather G is formed.
Here, a portion where the gather sheet 13 is fixed to the back sheet 10b and the top sheet 10a is referred to as a fixing portion 132, and a boundary between the fixing portion 132 and the free portion 131 is referred to as a base end portion 133.

  The free part 131 of the gather sheet 13 is provided with a plurality of thread rubbers (elastic members) 13c substantially parallel to the longitudinal direction of the gather sheet 13, and the three-dimensional gather sheet 13 is attached to the wearer by the thread rubber 13c. It can be stretched and deformed according to the shape of the body, making it easy to fit the wearer.

  In the fixing portion 132, two leg-holes elastic members 2b, 2b made of rubber thread or the like are provided between the gather sheets 13, 13 and the back sheet 10b, and are wider than the leg-hole elastic members 2b, 2b. Two crotch lower elastic members 2c and 2c made of thread rubber or the like are provided from the center.

The leg elastic members 2b, 2b and the crotch elastic members 2c, 2c pass from both edges of the fixing part 132 in the crotch part 17 along both curved edges of the rear leg peripheral parts 18, 18. It extends to the back-side extension portions 162 and 162 of the back-side portion 16 and is continuously arranged between the two sheets of the tape portions 20 and 20.
At this time, the leg elastic members 2b and 2b and the crotch elastic members 2c and 2c are provided so as to continue not only to the overlapping portion W1 but also to the protruding portion W2 in the tape portions 20 and 20. That is, the leg-hole elastic members 2b and 2b and the crotch lower elastic members 2c and 2c are continuously arranged to a position protruding from at least the main body portion of the tape portions 20 and 20.
Further, the crotch elastic members 2c and 2c reach from the both edges of the fixing portion 132 in the crotch 17 to the ventral side 15 via both edges of the front leg surrounding portions 19 and 19 along the curved shape. Further, the ventral extension portions 152 and 152 are arranged so as to be linear along the longitudinal direction.

  Plane gathers 137 and 137 are formed by the leg elastic members 2b and 2b and the crotch elastic members 2c and 2c, respectively, and fit around the legs of the wearer in a stretchable manner to prevent side leakage.

The elastic force (N / mm) by the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c is a part located in the tape parts 20, 20, a part located in the rear leg parts 18, 18, and a crotch part 17. It is comprised so that it may become small in order of the site | part located in.
Here, as shown in FIG. 5, the part located in the tape part 20, 20 is the area A, the part located in the rear leg surrounding part 18, 18 is the area B, the part located in the crotch part 17 is the area C, The expansion / contraction force (N / mm) is a force necessary for expanding / contracting the unit length.

That is, the stretching force by the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c is set to be the largest in the region A and the smallest in the region C. Thereby, when it pulls with the same force, the area | region C extends most.
Specifically, in the region A, the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c all expand and contract, and in the region B, the leg elastic members 2b, 2b and the crotch elastic members One of 2c and 2c is controlled not to expand and contract. In the region C, 2 to 3 of the leg-hole elastic members 2b and 2b and the crotch elastic members 2c and 2c are controlled so as not to expand and contract.

As one of the methods for controlling the stretching force, different adhesive application methods are used in the respective regions A, B, and C to fix the leg-hole elastic members 2b, 2b and the crotch elastic members 2c, 2c. It has been.
For example, in the area A, the adhesive is applied in a spiral shape between two sheets, and in the area B, the adhesive is applied in a curtain coat between the gather sheets 13 and 13 and the back sheet 10b. In the area C, the adhesive is solidly applied between the gather sheets 13 and 13 and the back sheet 10b. As described above, the expansion and contraction force of the leg-hole elastic members 2b and 2b and the crotch elastic members 2c and 2c is controlled by changing the density of the adhesive using different application methods in the respective regions.

  In the region A where the stretching force is the largest, no adhesive is applied to the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c, and in the region C where the stretching force is the smallest, the leg elastic members 2b, 2b. In the region B, a plurality of leg elastic members 2b, 2b and crotch elastic members 2c, 2c may be fixed.

  Further, the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c are not cut in the region A where the elastic force is the largest, and the leg elastic members 2b, 2b and the crotch elastic are not cut in the region C where the elastic force is the smallest. A plurality of members 2c and 2c may be cut and one of leg elastic members 2b and 2b and crotch elastic members 2c and 2c may be cut in region B.

Next, the operation of this embodiment will be described.
When the diaper 1 is mounted, the leg elastic members 2b and 2b and the crotch lower elastic members 2c and 2c are the crotch part 17, the rear leg peripheral parts 18 and 18, the overlapping part W1 of the tape parts 20 and 20, and the tape part 20 respectively. , 20 are continuously provided over the protruding portion W2, so that when the wearer raises and lowers the disposable diaper 1, the crotch portion 17, the rear leg surrounding portions 18, 18, and the tape portions 20, 20 are interlocked. It will expand and contract.

At this time, the elastic force of the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c changes according to the positions of the tape parts 20, 20, the rear leg peripheral parts 18, 18, and the crotch part 17. The expansion and contraction of the paper diaper 1 follows the movement of the wearer.
Specifically, the stretching force is set to be the largest in the part (area A) located in the tape parts 20 and 20, and the smallest in the part (area C) located in the crotch part 17, The crotch part 17 preferentially expands and contracts.

  Further, since the crotch elastic members 2c and 2c are linearly arranged along the longitudinal direction in the ventral side portion 15, when the wearer raises and lowers the paper diaper 1, the paper diaper 1 is subjected to a longitudinal force. It becomes easy to follow.

  As described above, according to the present invention, the crotch portion 17, the rear leg surrounding portions 18, 18, the overlapping portion W <b> 1 of the tape portions 20, 20, and the protruding portion W <b> 2 of the tape portions 20, 20 are continuous. Leg elastic members 2b and 2b and crotch lower elastic members 2c and 2c are provided, so that when the wearer raises and lowers the paper diaper 1 up and down, the rubber thread of the crotch 17 is also expanded and contracted. Therefore, the fit at the time of wearing can be improved.

In addition, the crotch elastic member 2c, 2c arranged linearly along the longitudinal direction in the ventral side portion 15 makes it easier for the disposable diaper 1 to follow the longitudinal force. It is difficult to occur, and the adhesion of the crotch part 17 can be improved.
In addition, since the elastic force of the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c differs depending on the regions A, B, and C, the crotch portion 17 preferentially expands and contracts. Can be increased.

  Moreover, the adhesiveness to the circumference | surroundings of a wearer's trunk | drum is provided by providing the back side elastic member 2a arrange | positioned linearly over the other tape part 20 via the back side part 16 from one tape part 20. Can be further enhanced.

  Accordingly, since the elastic member of the entire paper diaper 1 expands and contracts in an interlocking manner, the fit at the time of wearing is improved, and it is possible to prevent a part of the paper diaper 1 from being excessively tightened or lifted. The prevention effect is extremely high.

  Also on the ventral side 15 side, the elastic force of the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c depends on the part located in the crotch part 17 and the part located in the front leg parts 19, 19 May be changed. In other words, the crotch portion 17 can be preferentially expanded and contracted as compared with the portions located in the front leg surrounding portions 19 and 19.

Further, the leg elastic members 2b and 2b and the crotch elastic members 2c and 2c do not necessarily have to be provided up to the end in the width direction of the protruding portion W2 of the tape portions 20 and 20, and are provided up to the middle of the protruding portion W2. It may be.
In the present embodiment, the leg elastic members 2b, 2b and the crotch elastic members 2c, 2c are both provided over the overlapping portion W1 and the protruding portion W2 of the tape portions 20, 20. It is sufficient that at least the leg elastic members 2b and 2b are provided so as to continue to a part of the protrusion W2.
In addition, it is needless to say that the present invention is not limited to the above embodiment and can be modified as appropriate.

It is the plane expanded view developed by making the back surface sheet of the paper diaper 1 to which the present invention is applied the upper surface. FIG. 2 is a plan development view developed with the top sheet of the paper diaper 1 of FIG. 1 as an upper surface. It is sectional drawing in the III-III line of the paper diaper 1 of FIG. It is the perspective view which assembled the paper diaper 1 of FIG. 1 in the state at the time of mounting | wearing. It is a figure for demonstrating the change of the expansion-contraction force of leg periphery elastic members 2b and 2b and crotch lower part elastic members 2c and 2c.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper diaper 2a Back side elastic member 2b Leg elastic member 2c Crotch lower part elastic member 10 Paper diaper main body (main-body part)
10a Top sheet 10b Back sheet 12 Absorber 12a Center part 13, 13 Gather sheet 131 Free part 132 Fixed part 133 Base part 13c Rubber thread 15 Ventral part 151 End part 152, 152 Ventral extension part 154 Longitudinal edge Part 16 Back side part 161 End part 162, 162 Back side extension part 163, 163 Side edge part 164 Longitudinal edge part 165 Flat gather 17 Crotch part 18, 18 Rear leg part 19, 19 Front leg part 20, 20 Tape part 21, 21 Convex part 22 Fastening tape 24, 24 Side edge part W1 Overlapping part W2 Protruding part 30 Target part

Claims (3)

A body portion having a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorbent body interposed between the top sheet and the back sheet; A tape-type absorbent article comprising a pair of tape portions extending to both sides of the back side portion of the main body portion, and a target portion for locking the pair of tape portions ,
Legs positioned around the legs of the wearer at the time of wearing from both edges of the crotch part of the main body located between the abdomen and the back of the body located on the abdomen of the wearer when worn A leg-around elastic member arranged continuously through at least a portion of the pair of tape portions to a position protruding from the main body portion ;
A crotch elastic member provided from the ventral side portion to the dorsal side portion from the center in the width direction than the leg elastic member,
The crotch elastic member is continuously arranged from both edges of the crotch through the leg periphery to a position protruding from at least the main body of the pair of tape parts, and the abdomen An absorptive article characterized by being arranged linearly along the longitudinal direction on the side of the target part in the ventral side extension part extending to both outer sides than the crotch part of the side part . The elastic force necessary to extend and contract the leg elastic member and the crotch elastic member by a unit length is a part located in the tape part, a part located in the leg peripheral part, and a part located in the crotch part. The absorbent article according to claim 1 , wherein the absorbent article is smaller in the order of. Via the back side from one of the tape portions, according to claim 1 or along the other of said tape-width direction across characterized by comprising a back side elastic member disposed on a straight line 2. The absorbent article according to 2.

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